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JETP Letters

, Volume 87, Issue 11, pp 639–640 | Cite as

Phonons in a magnon superfluid and symmetry-breaking field

  • G. E. Volovik
Condensed Matter

Abstract

Recent experiments [1,2] on the measurement of the spectrum of the Goldstone collective mode of a coherently precessing state in 3He-B are discussed using the presentation of the coherent-spin precession in terms of the Bose-Einstein condensation of magnons. The mass in the spectrum of the Goldstone boson—a phonon in the superfluid magnon liquid—is induced by the symmetry-breaking field, which is played by the RF magnetic field.

PACS numbers

03.75.Kk 47.37.+q 67.30.Hj 

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Copyright information

© Pleiades Publishing, Ltd. 2008

Authors and Affiliations

  1. 1.Low Temperature LaboratoryHelsinki University of TechnologyHUTFinland
  2. 2.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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